diff --git a/src/plugins/platforms/cocoa/qnsview_drawing.mm b/src/plugins/platforms/cocoa/qnsview_drawing.mm
index 1b4178d4a3..d5e5a14835 100644
--- a/src/plugins/platforms/cocoa/qnsview_drawing.mm
+++ b/src/plugins/platforms/cocoa/qnsview_drawing.mm
@@ -213,6 +213,7 @@
 */
 - (void)drawRect:(NSRect)dirtyBoundingRect
 {
+    Q_UNUSED(dirtyBoundingRect);
     Q_ASSERT_X(!self.layer, "QNSView",
         "The drawRect code path should not be hit when we are layer backed");
 }